Node.js+postman to simulate HTTP server and client interaction

//Import http module const http = require('http')

// Create an http server const server = http.createServer((req, res) => {
		//Set the statusCode property to 200 to indicate a successful response res.statusCode = 200
  		// res essentially inherits the stream.Writable class // After sending the response header and body to the client, tell the server that the message transmission is over res.end("hollow server")
        // Equivalent to res.writer("hollow server")+res.end()
    })
    // Listen to the server. When the server is ready, the listen callback function will be called // The console prints that the startup is successful server.listen('8089', 'localhost', () => {
    console.log("Startup successful")
})

const http = require('http')
    // Module for processing URLs const url = require('url')
    // Module that handles query const qs = require('querystring')
const server = new http.Server((req, res) => {
    // The request object encapsulates all the information passed by the client to our server // Parse the url const { pathname, query } = url.parse(req.url)
    if (pathname === '/login') {
        //console.log(query)
            // qs's parse method can process the query // Convert the string type to a js object username=ahua&password=123 --> {username: 'ahua',password: 123}
        //console.log(qs.parse(query))
        const { username, password } = qs.parse(query)
        console.log(username, password)
        res.end('request result')
    }
    console.log(req.url)
    //Print request type console.log(req.method)
    //Request header console.log(req.headers)
})
server.listen('8089', 'localhost', () => {
    console.log("serve started successfully")
})

const http = require('http')
    // Module for processing URLs const url = require('url')
const server = new http.Server((req, res) => {
    // Get the pathname in the URL sent by the client
    const { pathname } = url.parse(req.url)
        // Determine whether it is login
    if (pathname === '/login') {
        // Determine whether the request sent by the client is a post request if (req.method === 'POST') {
            // Define the default encoding format for data sent from the client req.setEncoding('utf-8')
                // req.setEncoding('binary') binary defines binary encoding // Get the data in the body // The data in the body is written through the stream // When the data event is listened to, the input stream is obtained, that is, the relevant content in the body, and the result of this data can be returned req.on('data', (data) => {
                // JSON.parse() converts the string in the object into a js object // {"username":"阿花","passward":"123"} ---> {username: 'ahua',password: 123}
                const { username, password } = JSON.parse(data)
                console.log(username, passward)
            })
        }
    }

    res.end('request result')

})
server.listen('8089', 'localhost', () => {
    console.log("serve started successfully")
})